Laser-rf double-resonance spectroscopy in a storage ring

M. Kristensen, J. S. Hangst, Poul S Jessen, J. S. Nielsen, O. Poulsen, P. Shi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Laser-rf double-resonance spectroscopy of the hyperfine transition between F=0 and F=1 in the metastable 3S1 state of Li+6 was performed in 100-keV beam in the storage ring ASTRID. High efficiency of optical pumping was demonstrated for complex pumping schemes. A broadband (dc6 GHz) rf device was designed and used for rf spectroscopy in the storage ring. The possibility of obtaining coherent rf signals (Ramsey fringes) from successive interactions with the same field was investigated. Important limitations for the coherences due to magnetic-field inhomogeneities were observed. These led to randomization of the atomic polarization during only one turn in the storage ring and completely prevented observation of Ramsey fringes. This situation is different from the case of fundamental particles in a storage ring, where the polarization may be preserved for many round-trips. Limits were put on the demands to beam quality, beam positioning, and magnetic-field quality to overcome the problem. The effects of the rf device on the external degrees of freedom of the ion beam were investigated. Its small aperture substantially reduced the beam lifetime, and at very low rf frequencies the electric field in the rf device was able to excite external transverse resonances in the beam.

Original languageEnglish (US)
Pages (from-to)4100-4109
Number of pages10
JournalPhysical Review A
Volume46
Issue number7
DOIs
StatePublished - 1992
Externally publishedYes

Fingerprint

spectroscopy
lasers
very low frequencies
optical pumping
polarization
magnetic fields
metastable state
positioning
pumping
inhomogeneity
degrees of freedom
apertures
ion beams
broadband
life (durability)
electric fields
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

Cite this

Kristensen, M., Hangst, J. S., Jessen, P. S., Nielsen, J. S., Poulsen, O., & Shi, P. (1992). Laser-rf double-resonance spectroscopy in a storage ring. Physical Review A, 46(7), 4100-4109. https://doi.org/10.1103/PhysRevA.46.4100

Laser-rf double-resonance spectroscopy in a storage ring. / Kristensen, M.; Hangst, J. S.; Jessen, Poul S; Nielsen, J. S.; Poulsen, O.; Shi, P.

In: Physical Review A, Vol. 46, No. 7, 1992, p. 4100-4109.

Research output: Contribution to journalArticle

Kristensen, M, Hangst, JS, Jessen, PS, Nielsen, JS, Poulsen, O & Shi, P 1992, 'Laser-rf double-resonance spectroscopy in a storage ring', Physical Review A, vol. 46, no. 7, pp. 4100-4109. https://doi.org/10.1103/PhysRevA.46.4100
Kristensen, M. ; Hangst, J. S. ; Jessen, Poul S ; Nielsen, J. S. ; Poulsen, O. ; Shi, P. / Laser-rf double-resonance spectroscopy in a storage ring. In: Physical Review A. 1992 ; Vol. 46, No. 7. pp. 4100-4109.
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